Create a free account and log in then go to 'Add-ons' in the left hand menu. Change 'Official to 'Community ' (at the top right) and install all of the add-ons except 'Netflix' and Porn' (unless you want access to RedTube, YouPorn, Porn.com and Chaturbate but they will show explicit content in the main screen previews so use with caution). This will enable you to watch the Movies, TV Shows etc for free in various qualities of your choice from SD and HD right up to UHD where available.

Stremio is a video streaming application, that allows you to watch and organize video content from different services, including movies, series, live TV and video channels. The content is aggregated by an addon system providing streams from various sources.